EP1643157A1 - Courroie dentée - Google Patents

Courroie dentée Download PDF

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Publication number
EP1643157A1
EP1643157A1 EP04104744A EP04104744A EP1643157A1 EP 1643157 A1 EP1643157 A1 EP 1643157A1 EP 04104744 A EP04104744 A EP 04104744A EP 04104744 A EP04104744 A EP 04104744A EP 1643157 A1 EP1643157 A1 EP 1643157A1
Authority
EP
European Patent Office
Prior art keywords
belt
fabric
longitudinal
threads
twist
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04104744A
Other languages
German (de)
English (en)
Other versions
EP1643157B1 (fr
Inventor
Hermann Schulte
Reinhard Dr. Teves
Michael Kretzschmar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ContiTech Antriebssysteme GmbH
Original Assignee
ContiTech Antriebssysteme GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ContiTech Antriebssysteme GmbH filed Critical ContiTech Antriebssysteme GmbH
Priority to EP20040104744 priority Critical patent/EP1643157B1/fr
Publication of EP1643157A1 publication Critical patent/EP1643157A1/fr
Application granted granted Critical
Publication of EP1643157B1 publication Critical patent/EP1643157B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G1/00—Driving-belts
    • F16G1/28—Driving-belts with a contact surface of special shape, e.g. toothed

Definitions

  • the invention relates to a toothed belt made of rubber or rubber-like plastic for belt drives with at least one back roller having a tension cord and a fabric on the toothed belt back, wherein the fabric is vulcanized to the belt body by a vulcanization process and wherein the fabric over at least 80% of the belt width has an axisymmetric weave pattern of two crosswise crossing yarn systems of transverse filaments and stretchable longitudinal filaments twisted with continuous filaments, the axis of symmetry of the weave pattern lying on the belt spine between the lateral edges of the belt spine and their direction at an angle of not more than 5 ° from the direction of Deviates edges and wherein the longitudinal threads of the fabric are parallel to the axis of symmetry.
  • EP 0 571 887 A1 has a toothed belt with angled tooth rows, which has transversely or obliquely extending reinforcing threads to increase the transverse stiffness on the back of the belt.
  • B. cotton for the equipment of the strap back are stretch fabric, the longitudinal threads of permanently elastic Khoffselfäden or yarns (stretch yarns) or made of elastic materials such.
  • B. elastic polyurethane, for example Elasthan® or Dorlastan® have.
  • These stretch fabrics have long been used successfully for covering the teeth of timing belts.
  • the type of weave of these stretch fabrics is generally a twill weave, that is, the points of attachment in this weave pattern rise in an uninterrupted diagonal, forming the so-called twill. With twill fabrics, high thread densities are possible, so these fabrics have high strength and durability.
  • the fabrics are arranged on the back of the belt so that the longitudinal threads (weft threads) extend substantially in the belt longitudinal direction, whereby the belt receives sufficient bending strength.
  • a high cross-thread density (warp thread density) has a particularly positive effect on the edge abrasion resistance.
  • DE-GM 83 34 233 it is z. B. known to provide the back surface of the timing belt with a stretch fabric, which is composed of permanently metallized fibers. Such belts are intended to ensure a durable and reliable superficial electrical conductivity.
  • DE 100 29 470 C2 describes a toothed belt according to the preamble of claim 1, which has a back fabric with an axisymmetric in the belt longitudinal direction bond pattern.
  • the weave pattern of the fabric on the belt spine is at least 80% of the belt width axisymmetric to an axis of symmetry that lies on the belt spine between its edges.
  • An axisymmetric bond pattern means that the courses of the transverse and longitudinal threads and thus also their crossing points are axisymmetric to the axis of symmetry.
  • a weave repeat comprises, according to the weave weaving tutorial, the minimum number of intersections of transverse and longitudinal threads (warp and weft threads) which, in the transverse and longitudinal directions, adjoin one another in an interrupted sequence to determine the overall appearance of the weave.
  • the bond pattern and thread thickness of the longitudinal threads are matched to one another such that over at least 80% of the belt width there is an axisymmetric bond pattern despite any desired cut edges.
  • the present invention is based on the object, in a toothed belt with back tissue to reduce the tendency for expiration of timing pulleys on.
  • S-rotation occurs when, with the thread held vertically, the continuous fibers run parallel to the oblique beam of the letter S.
  • Z-rotation the fibers are parallel to the oblique beam of the letter Z.
  • Longitudinal threads are the threads that run in the longitudinal direction of the belt.
  • the toothed belt according to the invention runs straight and does not tilt, so that it does not roll on laterally on guide rollers or flanged wheels. If the belt drive has no or only a few guide rollers and flanged wheels, it can be prevented with the toothed belt according to the invention that the belt runs in its entirety from the belt pulley.
  • the number of longitudinal yarns with S-rotation equal to the number of longitudinal yarns with Z-rotation over the belt width ⁇ 30%. Due to this distribution of longitudinal yarns with S-twist and longitudinal yarns with Z-twist in the back of the belt, the running tendency of the belts is reduced particularly well.
  • the longitudinal threads with S-twist and the longitudinal threads with Z-twist are preferably present as a regular pattern. For example, always one, two, three, four, etc. threads of the same direction of rotation next to correspondingly equal to many threads of the other direction of rotation, which then again follow one, two, three, four, etc. threads of the other direction of rotation.
  • Fabrics with such a structure are easy to manufacture and ensure a good belt run. These are fabrics which have the highest possible degree of symmetry on the one hand through the bond pattern and on the other hand through the arrangement of S- and Z-twisted longitudinal threads.
  • Particularly preferred is when the longitudinal yarns with S-twist and the longitudinal yarns with Z-twist alternately (an S-turned, a Z-turned, an S-turned, etc.) are present.
  • the toothed belts by using a fabric having a breaking elongation in the belt longitudinal direction of more than 50% and a tension value at 5% elongation which is at least three times higher in the belt transverse direction than in the belt longitudinal direction, a high bending flexibility and elasticity of the belt can be achieved.
  • a high tension value of the fabric at 5% elongation in the belt transverse direction at the same time causes the flanks of the belt to be protected from abrasion, and the belts have good durability.
  • the elongation at break and the stress value (force per initial cross-section) at 5% elongation are determined in a simple tensile test with a tensile tester at constant extension speed of the pulling clamp at room temperature.
  • the introduced into the grips fabric strip has a width of 10 mm and the clamping length is z. B. 10 mm.
  • the fabric is for example prepared with its rubber embedding from the finished belt, cut accordingly and with the help of this strip, the elongation at break and the voltage value are determined.
  • DIN 53 815 To the terms for the simple tensile test in the testing of textiles. DIN 53 815.
  • toothed belts are generally carried out so that layers of the tensile strand, a rubber mixture plate and a spinal fabric body are successively laid on a steel cylinder designated as a mold with corresponding longitudinal grooves for the teeth.
  • a fabric stocking is generally made of a twill weave polyamide stretch fabric which is provided with an adhesive-impregnating solution, usually a resorcinol-formaldehyde Latex impregnation solution, treated, pulled on the mold.
  • the stretch fabrics with suitable rubber solutions, such.
  • a solution of the mixture which lies in the belt under the fabric, be prepared.
  • the "wound" mold is covered with a sleeve and transferred to a vulcanizing vessel (autoclave), where the winding blank is vulcanised under pressure.
  • a vulcanizing vessel autoclave
  • the back fabric connects to the back of the toothed belt wrap.
  • the roll is removed from the mold and from the cuff. Following this, belts of different widths can then be tapped off this winding.
  • the fabric on the back of the toothed belt which is likewise usually treated with an adhesive impregnation solution based on resorcinol, formaldehyde and rubber latices prior to processing, is wrapped around the winding blank or pulled over as a stocking, performs the function of removing gases generated during vulcanization.
  • An additional paper fleece to take over this function need no longer be applied during the production of the belt.
  • the fabric on the back of the belt is a fabric which contains polyamide stretch threads as longitudinal threads.
  • Such fabrics are characterized by good heat and abrasion resistance and are inexpensive.
  • the polyamide stretch threads are, for example, crimped polyamide threads.
  • a fabric with polyamide stretch threads as weft threads can also be a fabric with longitudinal threads of an inherently elastic material, such as elastic polyurethane, such. Elasthan® or Dorlastan®. These fabrics offer the advantage of being more stable to dynamic flex load than fabrics having crimped polyamide stretch filaments.
  • the fabric on the back of the belt on a Panama bond may, for. B. a plain weave, a rib weave or a herringbone act.
  • the fabric on the back of the belt on a Panama bond may, for. B. a plain weave, a rib weave or a herringbone act.
  • the fabric on the back of the belt on a Panama bond may, for. B. a plain weave, a rib weave or a herringbone act.
  • This type of binding combines a high thread density with a low repeat width.
  • the thread density is higher than with a plain weave and the longer thread length, until the thread changes again the fabric side, has a positive effect on the elasticity of the fabric.
  • the low repeatability compared to twill weave fabric allows the weave pattern on the back of the fabric to be axisymmetric over at least 80% of the belt width.
  • the fabric on the back of the belt effectively prevents the tendency to drain and at the same time other belt properties, such.
  • B. Biege Opbeptechnik or noise behavior, and the belt thickness are not adversely affected it has been found to make sense that the fabric is not thicker than 1.2 mm and not thinner than 0.7 mm. If the fabric is thicker than 1.2 mm, it overstretches too much on the back of the belt, which can eventually lead to belt failure. In addition, the belt becomes heavier and more expensive due to too thick a fabric. On the other hand, if the fabric is thinner than 0.7 mm, the small amount of overlying material will lead to losses in the edge abrasion resistance.
  • the fabric has advantageously been treated prior to further processing in the production of toothed belts with an adhesive impregnation solution based on resorcinol, formaldehyde and rubber latices, a so-called RFL dip.
  • timing belt In the conventional design of timing belt is also on the teeth of the belt, a fabric, in general, a stretch fabric with twill weave z. As polyamide, to increase the durability of the belt.
  • the tissue on the teeth protects the teeth from abrasion or shearing in the forces involved and increases the tooth stiffness, so that skipping of teeth can be prevented at high torques. Also, the low coefficient of friction of fabrics compared to rubber helps to improve the wear resistance of the teeth.
  • binding cartridges of some tissues are shown, which can be used as back fabric on the toothed belt according to the invention.
  • a "binding cartridge” is the textile expert's common representation of a tissue structure. In this context, again z. See, for example, the Brockhaus Encyclopaedia in Twenty-Four Volumes, FA Brockhaus, 19th Edition, Mannheim, 1987, Vol. 3, p. 330.
  • Each column of a binding cartridge corresponds to a transverse thread and each row to a longitudinal thread.
  • the binding cartridge la is that of a plain weave, 1b is a rib weave, 1c is a panama tie and 1d is a herringbone tie.
  • FIG. 2 shows the section of a back tissue 15 with a Panama weave.
  • the transverse threads 2 are all Z-turned.
  • the one longitudinal threads 3 are Z-turned, while the other longitudinal threads 4 are S-turned. S- and Z-twisted longitudinal threads alternate.
  • FIG. 3 shows a detail of a belt drive with a toothed belt 1 according to the invention, which passes by a toothed disk 9 and a back roller 10 (tensioning or deflection roller).
  • the belt is constructed of a rubber body 11 with a tension cord 12, a fabric 14 covering the teeth 13 and a fabric 15 on the belt back.
  • the fabric 15 is stretch fabric with panama weave.
  • This fabric 15 may for example be a polyamide fabric of thickness 1.04 mm, wherein the transverse threads have a fineness of 235 dtex and the longitudinal threads are crimped polyamide threads of six monofilaments (individual fibers), each having a fineness of 78 dtex. S- and Z-twisted longitudinal threads are alternately next to each other.
  • the bond pattern is axisymmetric over at least 80% of the belt width to an axis of symmetry that is parallel to the belt edges, and the longitudinal yarns are parallel to the axis of symmetry.
  • Toothed belts have been fabricated with woven polyamide PA 6.6 weave stretch woven panels and various longitudinal filament assemblies.
  • the fabric of a belt A had only longitudinal yarns with S-twist, while the back fabric of a second belt B had alternating S and Z-twisted longitudinal yarns.
  • the fabrics were treated with an RFL dip and the belts were made in the manner previously described. The fabrics were placed in all cases so that the longitudinal threads were substantially parallel to the belt edges.
  • Such belts were installed in a vehicle with gasoline engine and examined the running performance of the belt while driving. While the belt A showed after less than 100,000 km of driving an increased tendency to run and edge wear due to a skew of the belt, the belt B of the invention after more than 150000 km still no tendency to run and significantly reduced edge abrasion.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Woven Fabrics (AREA)
EP20040104744 2004-09-29 2004-09-29 Courroie dentée Not-in-force EP1643157B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20040104744 EP1643157B1 (fr) 2004-09-29 2004-09-29 Courroie dentée

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20040104744 EP1643157B1 (fr) 2004-09-29 2004-09-29 Courroie dentée

Publications (2)

Publication Number Publication Date
EP1643157A1 true EP1643157A1 (fr) 2006-04-05
EP1643157B1 EP1643157B1 (fr) 2014-11-12

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Family Applications (1)

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EP20040104744 Not-in-force EP1643157B1 (fr) 2004-09-29 2004-09-29 Courroie dentée

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EP (1) EP1643157B1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2549143A1 (fr) 2011-07-21 2013-01-23 ContiTech Antriebssysteme GmbH Courroie de transmission de force, notamment courroie trapézoïdale à nervures
DE102012206040A1 (de) 2012-04-13 2013-10-17 Contitech Antriebssysteme Gmbh Antriebsriemen, insbesondere Zahnriememen, mit einer Gewebeauflage
DE102013222921A1 (de) 2013-11-11 2015-05-13 Contitech Antriebssysteme Gmbh Antriebsriemen mit einer Textilauflage und Verfahren zu dessen Herstellung
EP3608075A1 (fr) 2018-08-08 2020-02-12 ContiTech Antriebssysteme GmbH Courroie d'entraînement dotée d'une face de courroie profilée
IT202100010394A1 (it) * 2021-04-23 2022-10-23 Costa S R L Processo per la realizzazione di un tessuto base per un tessuto aderizzato e tessuto base

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB889875A (en) * 1958-02-24 1962-02-21 Lewis & Tylor Ltd Transmission belting
DE2258650A1 (de) * 1972-11-30 1974-06-20 Siempelkamp Gmbh & Co Tragmittel fuer foerderbaender mit uebergabenase
DE10029470A1 (de) * 2000-06-15 2002-01-03 Contitech Antriebssysteme Gmbh Zahnriemen
WO2002063081A1 (fr) * 2001-02-02 2002-08-15 Milliken Europe N.V. Produit renforce par fil

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB889875A (en) * 1958-02-24 1962-02-21 Lewis & Tylor Ltd Transmission belting
DE2258650A1 (de) * 1972-11-30 1974-06-20 Siempelkamp Gmbh & Co Tragmittel fuer foerderbaender mit uebergabenase
DE10029470A1 (de) * 2000-06-15 2002-01-03 Contitech Antriebssysteme Gmbh Zahnriemen
WO2002063081A1 (fr) * 2001-02-02 2002-08-15 Milliken Europe N.V. Produit renforce par fil

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2549143A1 (fr) 2011-07-21 2013-01-23 ContiTech Antriebssysteme GmbH Courroie de transmission de force, notamment courroie trapézoïdale à nervures
WO2013010734A1 (fr) 2011-07-21 2013-01-24 Contitech Antriebssysteme Gmbh Courroie de transmission de force, notamment courroie trapézoïdale à nervures
DE102012206040A1 (de) 2012-04-13 2013-10-17 Contitech Antriebssysteme Gmbh Antriebsriemen, insbesondere Zahnriememen, mit einer Gewebeauflage
DE102013222921A1 (de) 2013-11-11 2015-05-13 Contitech Antriebssysteme Gmbh Antriebsriemen mit einer Textilauflage und Verfahren zu dessen Herstellung
EP3608075A1 (fr) 2018-08-08 2020-02-12 ContiTech Antriebssysteme GmbH Courroie d'entraînement dotée d'une face de courroie profilée
IT202100010394A1 (it) * 2021-04-23 2022-10-23 Costa S R L Processo per la realizzazione di un tessuto base per un tessuto aderizzato e tessuto base
WO2022224192A1 (fr) * 2021-04-23 2022-10-27 Costa S.R.L. Procédé de fabrication d'un tissu de base pour un tissu collé d'une courroie haute performance

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